Finding the Fourth Proportional to 1,903.83, 2,855.61 and 671.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,903.83 : 2,855.61 = 671.34 : x
2. Step 2: Convert to fraction form
   1,903.83/2,855.61 = 671.34/x
3. Step 3: Cross multiply
   1,903.83x = 2,855.61 × 671.34
4. Step 4: Simplify right side
   1,903.83x = 1,917,085.22
5. Step 5: Solve for x
   x = 1,917,085.22/1,903.83
6. Step 6: Final answer
   x = 1,006.96